Higher Order Spin Resonances in a 2.1 GeV/c Polarized Proton Beam
Abstract
Spin resonances can depolarize or spin-flip a polarized beam. We studied 1st and higher order spin resonances with stored 2.1 GeV/c vertically polarized protons. The 1st order vertical ({\nu}y) resonance caused almost full spin-flip, while some higher order {\nu}y resonances caused partial depolarization. The 1st order horizontal ({\nu}x) resonance caused almost full depolarization, while some higher order {\nu}x resonances again caused partial depolarization. Moreover, a 2nd order {\nu}x resonance is about as strong as some 3rd order {\nu}x resonances, while some 3rd order {\nu}y resonances are much stronger than a 2nd order {\nu}y resonance. One thought that {\nu}y spin resonances are far stronger than {\nu}x, and that lower order resonances are stronger than higher order; the data do not support this.
Keywords
Cite
@article{arxiv.1204.6002,
title = {Higher Order Spin Resonances in a 2.1 GeV/c Polarized Proton Beam},
author = {M. A. Leonova and J. A. Askari and K. N. Gordon and A. D. Krisch and J. Liu and V. S. Morozov and D. A. Nees and R. S. Raymond and D. W. Sivers and V. K. Wong and F. Hinterberger},
journal= {arXiv preprint arXiv:1204.6002},
year = {2015}
}
Comments
5 pages, 5 figures Note that Fig. 5 did not appear in the PRL due to space limitation, but did appear in the March 2012 CERN Courier News Item "Results from SPIN@COSY may bode well for RHIC"